Safety device for car-hauls.



No. 768,191. I PATENTED AUG. 23, 1904.

W. J. PATTER SON & A. M. AGKLIN.

SAFETY DEVICE FOR GAR HAULS.

. APPLICATION IILBD NOV. 2, 1903,

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W. J. PATTERSON & A, ML AGKL'IN. I

SAFETY DEVICE FOR GAR HAULS.

APPLICATION FILED NOV. 2, 1903.

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' 'VUNITED Patented August 23, 1904;.

PATE T OFFICE.

WILLIAM J. PATTERSON .A-ND ALFRED M. ACKLIN, OF PITTSBURG, PENN- SYLVANIA, ASSIGNORS TO HEYL AND PENNSYLVANIA, A OOPARTNERSHIP.

PATTERSON, OF PITTSB'URG,

SAFETY DEVICE FQR CAR-HAUL-S.

SPECIFICATION forming part of Letters Patent No. 768,191, dated. August 23,1904.

Application filed November 2,1903. Seria1No.179,519. (No model.)

To aZZ whom it may concern.-

Beit known that we, W1LLIAMJ..PATTERsoN and ALFRED M. Ao LIN, residents of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Safety Devices for Car- Hau-ls; and we do hereby declare the following to be a full, clear, and exact description thereof.

Our invention relates to a safetydevice for car-hauls.

The object of our invention is to provide an efiicient form of safety device by means of which the chain of the car-haul on the ascent.

' will be checked or held from slipping down in case of a break in the chain or driving gear.

Our lnventlon comprises, generally stated, 1n con unction with a traveling cham or cable 3 Fig. 2 is an enlarged side view of a portion of car-haul chain with our invention applied thereto. Fig. 3 is a plan view of same. Fig. 4 is a View of the brake-band.

Like numerals indicate like parts in each of the figures.

The numeral 2 designates a suitable chain or cable to which the cars are connected in any suitable manner for the purpose of drawing said cars up the'ascent to the point of The chain 2 passes around the sprocket-wheels 3 1 at the top and bottom of the haul, respectively, the upper wheel 3 being power-driven. Mounted within suitable bearings 5 in the frame 6is the shaft 7. A sprocket-wheel 8 is secured to the, shaft .7, said wheel having the recesses 9 between its teeth, and within these recesses the innerlinks 10 of the chain enter. The outer links 11 of "said pawls.

' 19, which passes over,thebrake-wheel 20.

and its sprocket-wheels,means for prevent-1' arrow, the cars attached thereto will also be said chain have a space between them into which the teeth of the sprocket-wheel 8 enter. Preferably formed integral with the sprocketwheel 8 is the circularratchet-face 12. Pawls 13 14 are adapted to engage this ratchet-face 12, said pawls being secured to the shafts 15 and 16, respectively. The longer pawl 14 is just back of and in line with the shorter pawl 13, so that when the shorter pawl is thrown out of engagement it also throws out the pawl 14:. A stop 17 regulates the movement of The shaft 15, on which pawl 13 is mounted, is journaled-in the frame, and to its opposite end is secured the arm 18. The opposite end of the arm 18'is connected to the brake-band 6 I 5 This band 19 is lined with wooden blocks 21, adapted to conform to the circumference of the brake-wheel, and to the free end of said brake-bandis secured the weight 22. This weight 22 may be .made up of a series of washers, so that its weight may bei-ncreased or diminished, as desired.

' If in the operation of the car-haul the chain 2 is driven to ascend in the direction of the.

carried up the haul. The sprocket-wheel 8 will be driven in the direction of the arrow and also the brake-wheel 20 on the same shaft. The rotation of brake-wheel 20 will create a pull on brake-band 19, which will act to lift arm 18. The lifting of arm 18 will act to throw out the pawl 13, and consequently pawl 14:. These pawls will be held out of engagement with the ratchet-face 12 as long as the brake-wheel continues to rotate in'this direction. If, however, the chain 2 should break at a point above the sprocket-wheel 8, the said sprocket-wheel will cease to rotate in direction indicated, and a force will be eX- I erted to pull it in the opposite direction. 9 However, immediately the break occurs the pull on brake-band'1'9 ceases, and the arm 18 is lowered and pawls 13 1 1 allowed to drop into engagement with ratchet-face 12. The backward movement of the sprocket-wheel 8 is checked, and as the teeth of said wheel project up between the links of the chain 2 the further slipping or descent of the chain is prevented.

It is apparent that our invention may be applied with efiect to the main power-shaft, so that when the power is cut oif for any reason with a number of loaded cars engaging the chain on the ascent the pawls will engage the ratchet-wheel on the power-shaft and tend to relieve the strain due to the backward pull occasioned by the weight of the loaded ears upon the chain. We do not wish to limit our invention to the construction illustrated, as that may be varied without affecting the scope of our invention.

What we claim is- 1. In a safety device for car-hauls, the combination with a power-driven endless chain, of a sprocket-wheel intermediate the ends of said haul engaged by said chain, and means for preventing the rotation of said sprocketwheel in the opposite direction from the travel of said chain.

2. In a safety device for car-hauls, the combination with a power-driven endless chain, of a sprocket-wheel adjacent to the sprocketwheel at the upper end of said car-haul, said first-named sprocket-wheel being engaged by said chain, and means for preventing the retation of said sprocket-wheel in the opposite direction from the travel of said chain.

3. In a safety device for car-hauls, the combination of a ratchet-wheel, a pawl adapted to engage therewith, a second pawl in the rear of said first-named pawl and in line therewith, and means for holding said first-named pawl out of engagement with said ratchet-wheel.

4:. In a safety device for car-hauls, the combination of a ratchet-wheel, a pawl adapted to engage therewith, a brake-wheel, a brakeband on said brake-wheel, and connections between said brake-band and said pawl, whereby said pawl is held out of engagement during the rotation of said brake-wheel.

5. In a safety device for car-hauls, the combination of a ratchet-wheel, a pawl adapted to engage-therewith, a brake-wheel, a brakeband engaging said brake-wheel, and an arm connected to said brake-band and to said pawl.

6. In a safety device for car-hauls, the (0111- bination of a ratchet-wheel, a pawl adapted to engage therewith, a brake-wheel, a weight ed brake-band engaging said brake-wheel, and connections between said brake-lanai and said pawl, whereby said pawl is held out of engagement with said ratchet-wheel during the movement of said wheel.

7. In a safety device for ear-hauls, the combination of a ratchet-wheel, a pawl adapted to engage therewith, a second pawl in the rear of said first-named pawl and in line therewith, a brake-wheel, a brake-band engaging said wheel, and connections between said brake band and said inner pawl, whereby said inner pawl is held out of engagement by the movement of said wheel.

8. In a safety device for car-hauls, the combination of a suitable sprocket-chai n, sprocketwheels at the upper and lower end of said earhaul engaged by said chain, a s n'oeket-wheel between said first-mentioned sprocket-wheels and engaged by said chain, a ratchet-wheel, a pawl adapted to engage said ratchet-wheel, a brake-wheel, a brake-band engaging said brake-wheel, connections between said pawl and said brake-band, whereby the said pawl is held out of engagement with said ratchet wheel during the rotation of said sprocketwheel.

In testimony whcreof we, the said \Ynaaan J. PATTERSON and ALFRED M. ACKLIN, have hereunto set our hands.

WILLIAM J PA'lT'lE RSON. ALFRED M. ACKLIN.

VVitn esses:

ROBERT C. 'lTo'r'rnN, Gr. C. RAYMOND. 

